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MCAT Biology > Digestion > Flashcards

Digestion Flashcards

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1
Q

Carb digestion enzymes?

A
  • salivary amylase (ptyalin)
  • pancreatic amylase
  • maltase
  • sucrase
  • lactase
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2
Q

Salivary amylase (ptyalin)?

A
  • produced in salivary glands
  • functions in mouth
  • hydrolyzes starch to maltose
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3
Q

Pancreatic amylase?

A
  • produced in pancreas
  • functions in small intestine
  • hydrolyzes starch to maltose
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4
Q

maltase?

A
  • produced in intestinal glands
  • functions in small intestine
  • hydrolyzes maltose to 2 glucoses
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5
Q

sucrase?

A
  • produced in intestinal glands
  • functions in small intestine
  • hydrolyzes sucrose to glucose and fructose
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6
Q

lactase?

A
  • produced in intestinal glands
  • functions in small intestine
  • hydrolyzes lactose to glucose and galactose
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7
Q

Protein digestion enzymes?

A

-Pepsin

Function in small intestin:

  • Trypsin
  • Chymotrypsin
  • Carboxypeptidases A and B
  • Aminopeptidase
  • Dipeptidase
  • Enteropeptidase
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8
Q

Pepsin?

A
  • produced in Gastric glands (chief cells)
  • functions in stomach
  • hydrolyzes specific peptide bonds
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9
Q

Protein digestive enzymes produced in pancreas?

A
  • Trypsin
  • Chymotrypsin
  • Carboxypeptidase A and B
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10
Q

Protein digestive enzymes produced in intestinal glands?

A
  • Aminopeptidase
  • Dipeptidase
  • Enteropeptidase
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11
Q

Trypsin?

A

hydrolyzes specific peptide bonds, converts chymotrypsinogen to chymotrypsin

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12
Q

Chymotrypsin?

A

hydrolyzes specific peptide bonds

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13
Q

Carboxypeptidases A and B?

A

hydrolyzes terminal peptide bond at C terminus

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14
Q

Aminopeptidase?

A

hydrolyzes terminal peptide bond at N terminus

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15
Q

Dipeptidases?

A

hydrolyzes pairs of amino acids

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16
Q

Enteropeptidase?

A

converts trypsinogen to trypsin

17
Q

How are lipids digested?

A
  • when chyme is present, the duodenum secretes the hormone cholecystokinin (CCK) into the blood
  • CCK stimulates the secretion of pancreatic enzymes and bile, and promotes satiety
  • bile is made in liver and emulsifies fat in small intestine, not an enzyme
18
Q

What enzyme digests lipids?

A

lipase, made in pancreas and hydrolyzes lipids in small intestine

MCAT Biology (11 decks)

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